1967G.L. CoonErrand of Mercy (Star Trek episode) (transcription)
We are to proceed to Organia and take whatever steps are necessary to prevent the Klingons from using it as a base. Ibid. The Klingons are a military dictatorship. War is their way of life. Life under the Klingon rule would be very unpleasant.
1967G. L. CoonMetamorphosis (Star Trek episode) (transcription)
[Kirk] The universal translator on the shuttlecraft. We can try that, talk to that thing. [Spock] The translator is for use with more congruent life forms. [Kirk] Adjust it, change it…. Adjusting the translator will give you something to do.